* commented out crashing section (control iterator stuff in MidiModel::const_iterator::operator++)
* added midi_panic() on no_roll in midi tracks so that all notes stop when pressing stop
* mark midi model edited on all changes so that recorded tracks get saved
git-svn-id: svn://localhost/ardour2/branches/3.0@3281 d708f5d6-7413-0410-9779-e7cbd77b26cf